Tamperproof One Way Bolt Sets are an ideal solution for helping to prevent theft of traffic, parking and property signs. Each set contains two 5/16” diameter one-way bolts, two breakaway nuts, two zinc coated washers, and two nylon washers for the sign face. These bolts can be used to mount signs with 3/8” mounting holes on U-Channel posts, composite posts, and square posts. 2" bolts are required for 1.12 lbs./ft. U-Channel posts and our composite fiberglass posts. 2-1/2" bolts are required for 1-3/4” square posts and 2 lbs./ft. U-channel posts with or without the addition of our sign saver plates. 3” bolts are required to mount signs on 2” square posts. A 5/8" socket and ratchet wrench will be needed to tighten the breakaway nuts down until they shear.

Special Freight Arrangement:Due to the size of this product, freight shipping will be required. You may contact our customer service team for a quote or you can place your order and a customer service representative will contact you about freight shipping charges.If you would like to use your own freight carrier, please include your freight carrier account in the special instructions box at the bottom of the checkout page before placing your order. A customer service representative will be in contact with you if there are any questions.

Phone: 800-274-6271 Fax: 800-279-6897

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Frequently Purchased Together

Tamperproof one-way bolts are an affordable solution for securing your signs and helping to prevent theft of your traffic, parking, and property signs. The unique design of the bolt head and breakaway nuts allows the both the bolts and nuts to be installed while making them almost impossible to remove without cutting tools.